Eraser-cleaner.



WIUOLLINS.

' 0 ERASER CLEANER.

N0 MODEL.

IAPPLIGATION FILED MAY 24, 1904.

PATENTED DBO. 20, 1904 anuenfoz' Collirz;

William U IT D STATE Fatented December 20, 1904 P TE-NT ()FFICE,

WILLIAM ooLLms, or FRAZEE, iiiinnnsorn.

"'ERASER-CLEANER.

SPECIFICATION forming part of Letters Patent No. 778,170,01atd December20,-:1'904.

sota, have invented new and useful Improvements in Eraser-Cleaners, ofwhich the following is a specification.

My invention relates to new and useful improvements in means forcleaning blackboarderasers; and its object is to provide a simple,inexpensive, and compact device of this character into which the eraserscan be readily placed and which will thoroughly separate the dust fromthe erasers and discharge it into a receptacle provided therefon.

With the above and other objects in view the invention consists of arevoluble drum which is suitably mounted above a dust-receptacle, andthis drum has oppositely-disposed inlets extending the full widththereof.

By placing the erasers in one of the inlets and rotating the drum in onedirection said erasers are caused to drop across the inlets successively, and their violent contact with the periphery of the drum causesthe dust to be separated therefrom, ,Apertures are provided whereby thedust may be blown from the drum and deposited in the dust-receptacle. Byreversing the movement of the drum the erasers are caused to falloutward through the out.

lets instead of dropping thereacross, The invention also consists of thefurther novel constructionandcombination of parts hereinafter more fullydescribed and claimed, andillustrated in the accompanying drawings,showing the preferred form of my invention, and in which-.- 7

Figure 1 is a perspective view of the machine, and Fig. 2 is a centralvertical longitudinal section through the machine.

Referring to the figures by numerals of reference, l 1. are standardswhich are'preferably crossed adjacent their upper ends'to form forks 2,in which is revolubly mounted ashaft 3, having a crank 4 or othersuitable device whereby the same may be readily rotated. Arranged upon.the shaft 3 is a revoluble drum formed of cam-shaped heads 5, havingoppositely-disposed shoulders 6, which are in aline- Application filedMay 24, 1904., Serial No. 209,511-

ment. Arranged on the peripheries of the heads 5 are curved plates 7,provided with perforations 8, and each plate extends from one set ofshoulders 6 to the opposite set and projects between said last-mentionedset of shoulders. All portions of the plates 7 are firmly secured to theheads 5 excepting those which project betweenthe shoulders 6.

Each

of these projecting portions is engaged by a I receptacle for dust, andmay be readily slid from positionupon the strips. 11.

When it is desired to clean erasers by means of the machine hereindescribed, the drum is rotated until the two inlets are in asubstantially horizontal plane, as shown in the drawings. The erasersare then dropped into the opening 10, extending downward between theshoulders 6, and fall by gravity into the drum.

,By rotating the drum in the direction of the arrow (shown in Fig. 2)the erasers are caused to slide or roll over theinner surfaces of theplates 7 and when the ends of the extensions of saidplates arrive attheir lowest positions the erasers will drop therefrom upon the nextsucceeding plates 7 The violent contact of the erasers with the plates 7produced in this manner causes the dust to separate from the erasers.When the drum rotates in the direction described, air is caused tocirculate therethrough from one opening 10 to the other and carriedoutward through the apertures 8 in the drum. The dust is thus carriedoutward and will fall by gravity into the-tray 18. The guide-strips 11may be of such size as to direct any scattered dust into the tray. Byrapidly rotating the drum manually or me chanically in theabove-described manner the dust may be quickly removed from the erasers,and after they have been cleaned they can be quickly discharged from themachine by merely reversing the movement of the drum. The erasers willthen slide outward under the projecting portions of the plates 7 andthrough the openings 10. By removing the rods 9 and reinserting theminto the apertures provided therefor the projecting portions of plates 7may be adjusted, so as to increase 'or diminish the size of the openings10, thereby producing a greater or less drop of the erasers during thecleaning operation. By providing apertures 14 in the projecting portionsof plates 7 the supply of air to the drum during its rotation isfacilitated.

In the foregoing description I have shown the preferred form of myinvention; but I do not limit myself thereto, as I am aware thatmodifications may be made therein Without departing from the spirit orsacrificing any of the advantages thereof, and I therefore reserve theright to make such changes as fairly fall Within the scope ofmy'invention.

Having thus described the invention, what is claimed as new is 1. Adevice of the character described consisting of a revoluble drum havingan adj ustable inlet in its periphery, one wall of the inlet forming aledge within the drum.

2. In a device of the character described, the combination with arevoluble drum having an inlet extending transversely of the peripherythereof; of an adjustable projecting portion Within the drum adjacentthe inlet.

3. In a device of the character described, the combination with arevoluble drum having an inlet in the periphery thereof and extendingtransversely of the drum, said inlet being in a plane with the center ofthe drum; of an adjustable projecting portion within the drum andadjacent the inlet.

In testimony whereof I aflix my signature in presence of two witnesses.

\VILLIAM COLLINS.

Witnesses:

L. W. OBERHAUSER, \VALTER JUST.

